Monroe
OneMonroe
Locations Throughout the Country
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Tel: (877) 740-2007
Fax: (800) 453-9683
Email: sales@askmonroe.com
Website: monroeengineering.com
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OneMonroe BUNA O-Rings are engineered to provide dependable sealing solutions for a wide range of industrial applications. Crafted from high-quality BUNA-N material, also known as Nitrile, these O-rings deliver exceptional resistance to oils, fuels, and various chemicals, making them a top choice for machinery, automotive, and hydraulic systems. Their robust design ensures a reliable seal in both low and high-pressure environments, protecting against leaks, contamination, and wear. Each O-ring is manufactured to precise industry standards, offering a secure fit and lasting performance that businesses can depend on in even the most demanding conditions.

Our selection of BUNA O-rings includes an extensive variety of sizes and specifications, designed to suit a wide array of sealing needs. From small to large diameters, OneMonroe provides O-rings that can be used across multiple industries, including aerospace, manufacturing, and construction. These O-rings are versatile, supporting applications that require excellent abrasion resistance and the ability to perform reliably in temperatures ranging from -40°F to 212°F. OneMonroe BUNA O-Rings are known for their compatibility with petroleum-based fluids and are often the go-to choice for applications involving oil and gas, where durability and flexibility are essential.

OneMonroe is dedicated to delivering high-quality, cost-effective solutions that meet the unique needs of its customers. Our BUNA O-rings undergo rigorous testing and quality control to ensure each product meets strict performance standards. Whether you’re in need of O-rings for maintenance, repair, or original equipment manufacturing, OneMonroe's BUNA O-rings provide a dependable, long-lasting solution. With a commitment to exceptional customer service, Monroe ensures you have access to the precise sealing products you need to keep your operations running smoothly.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

BS O-Rings
Unit of Measure
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Item #

IntegrationID

Type

Material

Cross Section Width

Durometer

Inside Diameter

CSW Tolerance

BS Number

Quantity
BS344 B-90 N/A
184618 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 3.850 in97.79 mm N/A 0.005 in0.13 mm N/A -344
BS343 B-70 N/A
184619 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 3.725 in94.62 mm N/A 0.005 in0.13 mm N/A -343
BS343 B-90 N/A
184620 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 3.725 in94.62 mm N/A 0.005 in0.13 mm N/A -343
BS342 B-70 N/A
184621 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 3.600 in91.44 mm N/A 0.005 in0.13 mm N/A -342
BS342 B-90 N/A
184622 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 3.600 in91.44 mm N/A 0.005 in0.13 mm N/A -342
BS341 B-70 N/A
184623 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 3.475 in88.27 mm N/A 0.005 in0.13 mm N/A -341
BS341 B-90 N/A
184624 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 3.475 in88.27 mm N/A 0.005 in0.13 mm N/A -341
BS340 B-70 N/A
184625 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 3.350 in85.09 mm N/A 0.005 in0.13 mm N/A -340
BS340 B-90 N/A
184626 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 3.350 in85.09 mm N/A 0.005 in0.13 mm N/A -340
BS339 B-70 N/A
184627 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 3.225 in81.92 mm N/A 0.005 in0.13 mm N/A -339
BS339 B-90 N/A
184628 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 3.225 in81.92 mm N/A 0.005 in0.13 mm N/A -339
BS338 B-70 N/A
184629 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 3.100 in78.74 mm N/A 0.005 in0.13 mm N/A -338
BS338 B-90 N/A
184630 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 3.100 in78.74 mm N/A 0.005 in0.13 mm N/A -338
BS337 B-70 N/A
184631 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 2.975 in75.57 mm N/A 0.005 in0.13 mm N/A -337
BS337 B-90 N/A
184632 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 2.975 in75.57 mm N/A 0.005 in0.13 mm N/A -337
BS336 B-70 N/A
184633 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 2.850 in72.39 mm N/A 0.005 in0.13 mm N/A -336
BS336 B-90 N/A
184634 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 2.850 in72.39 mm N/A 0.005 in0.13 mm N/A -336
BS335 B-70 N/A
184635 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 2.725 in69.22 mm N/A 0.005 in0.13 mm N/A -335
BS335 B-90 N/A
184636 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 2.725 in69.22 mm N/A 0.005 in0.13 mm N/A -335
BS334 B-70 N/A
184637 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 2.600 in66.04 mm N/A 0.005 in0.13 mm N/A -334
BS334 B-90 N/A
184638 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 2.600 in66.04 mm N/A 0.005 in0.13 mm N/A -334
BS333 B-70 N/A
184639 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 2.475 in62.87 mm N/A 0.005 in0.13 mm N/A -333
BS333 B-90 N/A
184640 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 2.475 in62.87 mm N/A 0.005 in0.13 mm N/A -333
BS332 B-70 N/A
184641 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 70 N/A 2.350 in59.69 mm N/A 0.005 in0.13 mm N/A -332
BS332 B-90 N/A
184642 		N/A BS Standard O-Ring N/A Buna N/A 0.210 in5.33 mm N/A 90 N/A 2.350 in59.69 mm N/A 0.005 in0.13 mm N/A -332
Unit of Measure
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